ACB-1

Amphibious Construction Battalion ONE (ACB-1) was commissioned on July 16, 1943, at Camp Peary, Virginia, as part of the U.S. Navy’s effort to support amphibious operations during World War II. The unit played a vital role in constructing and operating pontoon causeways, beachhead facilities, and support installations during major Pacific campaigns, including the invasions of Iwo Jima and Okinawa. In the decades following World War II, ACB-1 continued to support U.S. Navy and Marine Corps missions in Korea, Vietnam, and more recent operations, providing essential logistical and engineering capabilities. Today, ACB-1 remains based at Naval Amphibious Base Coronado, California, standing ready to deliver specialized amphibious construction and support wherever needed.